.expand-down {
  font-family:Arial, Helvetica, sans-serif;
  line-height:normal;
  margin-top:20px;
  height:100px;
  width:550px;
  background: url(/images/demos/macosx-style-background.png) no-repeat;
  margin-bottom:30px;
}
/* reset margins and paddings */
.expand-down * {
  margin: 0;
  padding: 3;
}
.expand-down ul {
  padding-top:10px;
  margin-left:10px;
}
.expand-down ul li {
  float:left;
  list-style-type:none;
}
.expand-down ul li a {
  text-decoration:none;
}
.expand-down ul li a img {
  width:50px;  /* initial width of images, 50% of width */
  height:50px; /* initial height of images, 50% of height */
  border:none;
}
/* initially, don't show the label inside <span> tag */
.expand-down ul li a span {
  display:none;
}
.expand-down ul li:hover a span {
  /* show label on mouse hover */
  display:block;
  font-size:14px;
  text-align:center;
  color: #333;
  font: 11px verdana,verdana, arial;  
}
/* expand the image to 100% on mouse hover.
** an image becomes active when mouse hovers it
** ideally, the image should have same width and height as below 
*/
.expand-down ul li:hover a img {
  width:100px;
  height:100px;
}
/* expand the image next to the right of the active image to 60% using + selector */
.expand-down ul li:hover + li a img {
  width:60px;
  height:60px;
}
/* expand the image second to the right of the active image to 55% using + selectors */
.expand-down ul li:hover + li + li a img {
  width:55px;
  height:55px;
}